The general trend is that over time, a construction starts out as two words, eventually becomes hyphenated, and finally ends up as one word. I.e., lawn mower becomes lawn-mower becomes lawnmower. Me, I prefer it as two words, but maybe that's because I'm an old fart and resistant to change.
Either the mobile apps or the tool will get you personalized refund information based on the processing of your tax return. They will provide an actual refund date as soon as the IRS processes your tax return and approves your refund. Most refunds will be issued in less than 21 days.
Once you filed your taxes and the IRS accepts the filing, your refund (by check or direct deposit) should be on its way within 21 days if you file electronically, or up to six weeks if you file a paper return by mail.